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package json
import (
"bytes"
"fmt"
"reflect"
"strconv"
"testing"
)
type funcN struct {
Arg1 int `json:"arg1"`
Arg2 int `json:"arg2"`
}
type funcs struct {
Func2 *funcN `json:"$func2"`
Func1 *funcN `json:"$func1"`
}
type funcsText struct {
Func1 jsonText `json:"$func1"`
Func2 jsonText `json:"$func2"`
}
type jsonText struct {
json string
}
func (jt *jsonText) UnmarshalJSON(data []byte) error {
jt.json = string(data)
return nil
}
type nestedText struct {
F jsonText
B bool
}
type unquotedKey struct {
S string `json:"$k_1"`
}
var ext Extension
type keyed string
func decodeKeyed(data []byte) (interface{}, error) {
return keyed(data), nil
}
type keyedType struct {
K keyed
I int
}
type docint int
type const1Type struct{}
var const1 = new(const1Type)
func init() {
ext.DecodeFunc("Func1", "$func1")
ext.DecodeFunc("Func2", "$func2", "arg1", "arg2")
ext.DecodeFunc("Func3", "$func3", "arg1")
ext.DecodeFunc("new Func4", "$func4", "arg1")
ext.DecodeConst("Const1", const1)
ext.DecodeKeyed("$key1", decodeKeyed)
ext.DecodeKeyed("$func3", decodeKeyed)
ext.EncodeType(docint(0), func(v interface{}) ([]byte, error) {
s := `{"$docint": ` + strconv.Itoa(int(v.(docint))) + `}`
return []byte(s), nil
})
ext.DecodeUnquotedKeys(true)
ext.DecodeTrailingCommas(true)
}
type extDecodeTest struct {
in string
ptr interface{}
out interface{}
err error
noext bool
}
var extDecodeTests = []extDecodeTest{
// Functions
{in: `Func1()`, ptr: new(interface{}), out: map[string]interface{}{
"$func1": map[string]interface{}{},
}},
{in: `{"v": Func1()}`, ptr: new(interface{}), out: map[string]interface{}{
"v": map[string]interface{}{"$func1": map[string]interface{}{}},
}},
{in: `Func2(1)`, ptr: new(interface{}), out: map[string]interface{}{
"$func2": map[string]interface{}{"arg1": float64(1)},
}},
{in: `Func2(1, 2)`, ptr: new(interface{}), out: map[string]interface{}{
"$func2": map[string]interface{}{"arg1": float64(1), "arg2": float64(2)},
}},
{in: `Func2(Func1())`, ptr: new(interface{}), out: map[string]interface{}{
"$func2": map[string]interface{}{"arg1": map[string]interface{}{"$func1": map[string]interface{}{}}},
}},
{in: `Func2(1, 2, 3)`, ptr: new(interface{}), err: fmt.Errorf("json: too many arguments for function Func2")},
{in: `BadFunc()`, ptr: new(interface{}), err: fmt.Errorf(`json: unknown function "BadFunc"`)},
{in: `Func1()`, ptr: new(funcs), out: funcs{Func1: &funcN{}}},
{in: `Func2(1)`, ptr: new(funcs), out: funcs{Func2: &funcN{Arg1: 1}}},
{in: `Func2(1, 2)`, ptr: new(funcs), out: funcs{Func2: &funcN{Arg1: 1, Arg2: 2}}},
{in: `Func2(1, 2, 3)`, ptr: new(funcs), err: fmt.Errorf("json: too many arguments for function Func2")},
{in: `BadFunc()`, ptr: new(funcs), err: fmt.Errorf(`json: unknown function "BadFunc"`)},
{in: `Func2(1)`, ptr: new(jsonText), out: jsonText{"Func2(1)"}},
{in: `Func2(1, 2)`, ptr: new(funcsText), out: funcsText{Func2: jsonText{"Func2(1, 2)"}}},
{in: `{"f": Func2(1, 2), "b": true}`, ptr: new(nestedText), out: nestedText{jsonText{"Func2(1, 2)"}, true}},
{in: `Func1()`, ptr: new(struct{}), out: struct{}{}},
// Functions with "new" prefix
{in: `new Func4(1)`, ptr: new(interface{}), out: map[string]interface{}{
"$func4": map[string]interface{}{"arg1": float64(1)},
}},
// Constants
{in: `Const1`, ptr: new(interface{}), out: const1},
{in: `{"c": Const1}`, ptr: new(struct{ C *const1Type }), out: struct{ C *const1Type }{const1}},
// Space after quoted key
{in: `{"c" : Const1}`, ptr: new(struct{ C *const1Type }), out: struct{ C *const1Type }{const1}},
// Keyed documents
{in: `{"v": {"$key1": 1}}`, ptr: new(interface{}), out: map[string]interface{}{"v": keyed(`{"$key1": 1}`)}},
{in: `{"k": {"$key1": 1}}`, ptr: new(keyedType), out: keyedType{K: keyed(`{"$key1": 1}`)}},
{in: `{"i": {"$key1": 1}}`, ptr: new(keyedType), err: &UnmarshalTypeError{"object", reflect.TypeOf(0), 18}},
// Keyed function documents
{in: `{"v": Func3()}`, ptr: new(interface{}), out: map[string]interface{}{"v": keyed(`Func3()`)}},
{in: `{"k": Func3()}`, ptr: new(keyedType), out: keyedType{K: keyed(`Func3()`)}},
{in: `{"i": Func3()}`, ptr: new(keyedType), err: &UnmarshalTypeError{"object", reflect.TypeOf(0), 13}},
// Unquoted keys
{in: `{$k_1: "bar"}`, ptr: new(interface{}), out: map[string]interface{}{"$k_1": "bar"}},
{in: `{$k_1: "bar"}`, ptr: new(unquotedKey), out: unquotedKey{"bar"}},
{in: `{$k_1: "bar"}`, noext: true, ptr: new(interface{}),
err: &SyntaxError{"invalid character '$' looking for beginning of object key string", 2}},
{in: `{$k_1: "bar"}`, noext: true, ptr: new(unquotedKey),
err: &SyntaxError{"invalid character '$' looking for beginning of object key string", 2}},
// Trailing commas
{in: `{"k": "v",}`, ptr: new(interface{}), out: map[string]interface{}{"k": "v"}},
{in: `{"k": "v",}`, ptr: new(struct{}), out: struct{}{}},
{in: `["v",]`, ptr: new(interface{}), out: []interface{}{"v"}},
{in: `{"k": "v",}`, noext: true, ptr: new(interface{}),
err: &SyntaxError{"invalid character '}' looking for beginning of object key string", 11}},
{in: `{"k": "v",}`, noext: true, ptr: new(struct{}),
err: &SyntaxError{"invalid character '}' looking for beginning of object key string", 11}},
{in: `["a",]`, noext: true, ptr: new(interface{}),
err: &SyntaxError{"invalid character ']' looking for beginning of value", 6}},
}
type extEncodeTest struct {
in interface{}
out string
err error
}
var extEncodeTests = []extEncodeTest{
{in: docint(13), out: "{\"$docint\":13}\n"},
}
func TestExtensionDecode(t *testing.T) {
for i, tt := range extDecodeTests {
in := []byte(tt.in)
// v = new(right-type)
v := reflect.New(reflect.TypeOf(tt.ptr).Elem())
dec := NewDecoder(bytes.NewReader(in))
if !tt.noext {
dec.Extend(&ext)
}
if err := dec.Decode(v.Interface()); !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: %v, want %v", i, err, tt.err)
continue
} else if err != nil {
continue
}
if !reflect.DeepEqual(v.Elem().Interface(), tt.out) {
t.Errorf("#%d: mismatch\nhave: %#+v\nwant: %#+v", i, v.Elem().Interface(), tt.out)
data, _ := Marshal(v.Elem().Interface())
t.Logf("%s", string(data))
data, _ = Marshal(tt.out)
t.Logf("%s", string(data))
continue
}
}
}
func TestExtensionEncode(t *testing.T) {
var buf bytes.Buffer
for i, tt := range extEncodeTests {
buf.Truncate(0)
enc := NewEncoder(&buf)
enc.Extend(&ext)
err := enc.Encode(tt.in)
if !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: %v, want %v", i, err, tt.err)
continue
}
if buf.String() != tt.out {
t.Errorf("#%d: mismatch\nhave: %q\nwant: %q", i, buf.String(), tt.out)
}
}
}
|
